To be fair, network connections have significantly improved since the 90s.
Your point still stands though, on a wireless network, it only takes some interference from other devices to cause latency spikes that make latency sensitive games frustrating to play, even if the actual upstream connection is of high quality. I've had quite a bit of issues with playing games on wireless networks in urban areas that go away magically by using an ethernet cable; the stuttering that happens when ping spikes from 30ms to 400ms is very jarring.
If Stadia is used for games that are not latency sensitive, such as deckbuilding games or turn based strategy games, it's fine. Using it for competitive first person shooters is likely to be very frustrating on anything but a wired network with good upstream connectivity or a wireless network with no major noise sources.
Yeah and wifi is already pulling out all the tricks like FEC, CSMA and the like just to scale with usage.
At the end of the day the internet is a packet switched and not circuit switched topology despite telecom pushing hard for circuit switched in the early days. Preference is given for throughput and not latency(although network-next is working to address some of that).
Your point still stands though, on a wireless network, it only takes some interference from other devices to cause latency spikes that make latency sensitive games frustrating to play, even if the actual upstream connection is of high quality. I've had quite a bit of issues with playing games on wireless networks in urban areas that go away magically by using an ethernet cable; the stuttering that happens when ping spikes from 30ms to 400ms is very jarring.
If Stadia is used for games that are not latency sensitive, such as deckbuilding games or turn based strategy games, it's fine. Using it for competitive first person shooters is likely to be very frustrating on anything but a wired network with good upstream connectivity or a wireless network with no major noise sources.